<template>
  <view v-if="goodsInfo.goods_name" style="padding-bottom: 90rpx">
    <!-- 轮播图区域 -->
    <swiper
      :indicator-dots="true"
      :autoplay="true"
      :interval="3000"
      :duration="1000"
      :circular="true"
    >
      <swiper-item v-for="(item, i) in goodsInfo.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{ goodsInfo.goods_price }}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{ goodsInfo.goods_name }}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费 -- {{ cart.length || 0 }}</view>
    </view>
    <!-- 商品详情信息 富文本-->
    <rich-text :nodes="goodsInfo.goods_introduce"></rich-text>

    <!-- 商品导航栏 -->
    <view class="goods_nav">
      <!-- fill 控制右侧按钮的样式 -->
      <!-- options 左侧按钮的配置项 -->
      <!-- buttonGroup 右侧按钮的配置项 -->
      <!-- click 左侧按钮的点击事件处理函数 -->
      <!-- buttonClick 右侧按钮的点击事件处理函数 -->
      <uni-goods-nav
        :fill="true"
        :options="options"
        :buttonGroup="buttonGroup"
        @click="onClick"
        @buttonClick="buttonClick"
      />
    </view>
  </view>
</template>

<script>
import { getGoodsDetailAPI } from "@/api/goods_detail";
import { mapMutations, mapState } from "vuex";
export default {
  data() {
    return {
      goodsInfo: {},
      options: [
        {
          icon: "shop",
          text: "店铺",
          info: 0,
          infoBackgroundColor: "#007aff",
          infoColor: "red",
        },
        {
          icon: "cart",
          text: "购物车",
          info: 0,
        },
      ],
      buttonGroup: [
        {
          text: "加入购物车",
          backgroundColor: "#ff0000",
          color: "#fff",
        },
        {
          text: "立即购买",
          backgroundColor: "#ffa200",
          color: "#fff",
        },
      ],
    };
  },
  computed: {
    ...mapState("goods", ["cart"]),
  },
  onLoad({ goods_id }) {
    this.getGoodsDetail(goods_id);
    this.options[1].info = this.cart.length;
  },
  methods: {
    ...mapMutations("goods", ["addToCart"]),
    async getGoodsDetail(goods_id) {
      const res = await getGoodsDetailAPI(goods_id);
      this.goodsInfo = res.message;
    },
    //预览轮播图效果
    preview(index) {
      uni.previewImage({
        current: index,
        urls: this.goodsInfo.pics.map((pic) => pic.pics_big),
      });
    },
    //左侧按钮的点击事件处理函数
    onClick(e) {
      if (e.index === 1) {
        wx.switchTab({
          url: "/pages/cart/index",
        });
      }
    },
    // 右侧按钮的点击事件处理函数
    buttonClick(e) {
      if (e.index === 0) {
        // 加入购物车

        // 2. 组织一个商品的信息对象
        const goods = {
          goods_id: this.goodsInfo.goods_id, // 商品的Id
          goods_name: this.goodsInfo.goods_name, // 商品的名称
          goods_price: this.goodsInfo.goods_price, // 商品的价格
          goods_count: 1, // 商品的数量
          goods_small_logo: this.goodsInfo.goods_small_logo, // 商品的图片
          goods_state: true, // 商品的勾选状态
        };
        this.addToCart(goods);
        this.options[1].info = this.cart.length;
      } else if (e.index === 1) {
        // 立即购买
      }
    },
  },
};
</script>

<style lang="scss" scoped>
// 轮播图
swiper {
  height: 750rpx;

  image {
    width: 100%;
    height: 100%;
  }
}
// 商品信息区域的样式
.goods-info-box {
  padding: 10px;
  padding-right: 0;

  .price {
    color: #c00000;
    font-size: 18px;
    margin: 10px 0;
  }

  .goods-info-body {
    display: flex;
    justify-content: space-between;

    .goods-name {
      font-size: 13px;
      padding-right: 10px;
    }
    // 收藏区域
    .favi {
      width: 120px;
      font-size: 12px;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      border-left: 1px solid #efefef;
      color: gray;
    }
  }

  // 运费
  .yf {
    margin: 10px 0;
    font-size: 12px;
    color: gray;
  }
}
// 商品导航栏
.goods_nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
</style>